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给定这样的函数:
- (NSString *) changemystringsomehow { // do something to the string / check the string return ?; }
我将如何在另一个函数中使用它来取回“已更改”的字符串?
好吧,阅读他们说的*手册。我发现文档有时难以理解,但我试了一下。我找到了答案并学会了如何制作一个类别。
自定义现有类